The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Nov. 03, 1981

Filed:

Nov. 06, 1979
Applicant:
Inventors:

Masao Nishikawa, Tokyo, JP;

Hitoshi Yamamoto, Asaka, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16F / ;
U.S. Cl.
CPC ...
188319 ; 16DI / ; 1374939 ; 18832215 ;
Abstract

A shock absorber has expansion and compression damping characteristics readily adjustable, if required, to different extents. In one preferred form, it includes an adjustable orifice associated with a piston, and the orifice includes an annular flexible valve element and a valve-seat member engageable with the inner peripheral edge thereof. The valve-seat member is formed at the bottom with feet which are arranged opposite to a stepped or continuously inclined annular top surface portion of the piston and is axially movable for engagement with the latter. The amount of axial movement of the valve-seat member and hence that of deflection of the valve element is adjustable by rotation of the valve-seat member relative to the piston through provision therefor at the top of the cylinder. In an alternative form, the shock absorber has an expansion and a compression damping mechanism separately incorporated therein, including an externally adjustable valve mechanism arranged in the bottom of the cylinder in addition to the one associated with the piston. In this instance, the cylinder is received in a tubular casing for rotation relative thereto.


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